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Volume 15, Issue 30 (1-2020)                   Marine Engineering 2020, 15(30): 69-79 | Back to browse issues page

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Yousefifard M, Maboodi A. Evaluation of the effect of stern wedge on instability control and reduction of the resistance of a semi-planing catamaran. Marine Engineering 2020; 15 (30) :69-79
URL: http://marine-eng.ir/article-1-751-en.html
Evaluation of the effect of stern wedge on instability control and reduction of the resistance of a semi-planing catamaran
Mahdi Yousefifard * 1, Ashkan Maboodi1
1- Babol Noshirvani University of Technology
Abstract:   (4014 Views)
In this research, the main focus is on monitoring the dynamic instability created in a semi-planing catamarn and reducing the amplitude of these movements using a stern wedge. This is done using the model analysis in different Froude numbers in both the original and modified body conditions. Numerical analysis is also provided by solving the Reynolds-averaged Navier–Stokes equations and OpenFOAM open-source code. In addition to verifying the numerical solution method based on experimental data, it can be seen that the installation of a stern wedge of the ship has a very positive effect on reducing the range of dynamic motions in calm water. The effect of this motion decrease can also be seen in the resistance-speed chart. The most important achievement of this research is the creation of a numerical tank for simulating dynamic motions and accurate recording of details of fluid flow around the planing and semi- planing hulls. The result of the stern wedge installation and numerical and experimental analysis is a 12 percent reduction in ship resistance at design speed. 
Keywords: Catamaran, Semi-planing hull, Stern wedge, Hydrodynamics instability
Full-Text [PDF 1142 kb]   (1944 Downloads)    
Type of Study: Research Paper | Subject: Ship Hydrodynamic
Received: 2019/07/25 | Accepted: 2019/11/26
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